OpenCV报错：AttributeError: module ‘cv2‘ has no attribute ‘data‘

OpenCV报错：AttributeError: module ‘cv2’ has no attribute 'data’
运行人脸检测代码时会出现如下报错：

face_detector = cv.CascadeClassifier(cv.data.haarcascades + "haarcascade_frontalface_alt2.xml")
eye_detector = cv.CascadeClassifier(cv.data.haarcascades + "haarcascade_eye.xml")
smile_detector = cv.CascadeClassifier(cv.data.haarcascades + "haarcascade_smile.xml")


AttributeError: module 'cv2' has no attribute 'data'

解决办法：卸载你现有的opencv-python，安装我这个版本的opencv

1.打开Anaconda prompt，输入

pip uninstall opencv-python

2.再输入

pip install opencv-python -i http://mirrors.aliyun.com/pypi/simple --trusted-host mirrors.aliyun.com

注意事项：卸载opencv要选y，爆红不用管